First of all, give thanks to Luis Pascual, Luispa, for the .py file that let us to convert the .m3u we get from openwebif to hts format, tvheadend. This project, https://github.com/LuisPalacios/iptv2hts , let you to manage EPG and picons too.

We get it in three simple steps:

Copy iptv2hts.py and .m3u of services or stream we get from openwebif to the tvheadend instalation folder, it would be /etc/tvheadend in ubuntu distro, I think so.

Now, we have to stop tvheadend:
service tvheadend stop

Then, we have to run this line on console, inside the folder /etc/tvheadend and logged in as hts user (sudo chmod 777 iptv2hts.py):

/etc/tvheadend/./iptv2hts.py -r -n 0 -i eth0 -c utf-8 services.m3u

We are deleting the number of the channel (-r) necessary to generate channel number starting with 0 (-n 0) we indicate the m3u code (-c utf-8) the interface we are working with (-i eth0, for example), and finally the *.m3u file we want to convert.

This will create the channels on tvheadend, the input name comes inside the .py file, you can change it before run the .py, by default the input network name will be IPTV Movistar.

Now, lets to start tvheadend

service tvheadend start

Now, when we goes to configuration>dvb inputs>networks we will find the network we define inside the .py file or the default network name IPTV Movistar.

It's the moment to force scan of the network, taking in consideration one thing:

If we import a complete service with several channels, we have to edit the input network and we place 1 on maximun # input stream field.

If we import a single channel it doesn't care.

Now select the network and click to force scan. You will see how the total muxes goes to scan queue, and decrease up to 0. When al muxes are scaned with their services, we can go to services, and map all services.